# -*- coding: utf-8 -*-#
#-------------------------------------------------------------------------------
# 建立者:        Young  
# Name:         demo4.22
# Description:
# Author:       $赵怡蕾
# Date:         2019/1/29
#-------------------------------------------------------------------------------

str = "I love you"
print("you" in str)              # 运行结果：True
print("hello" in str)            # 运行结果：False
names = ["Bill","Mike","John"]
print("Mike" in names)           # 运行结果：True
print("Mary" in names)           # 运行结果：False